There's API gateway products (Apigee, Kong, etc). Load balancers and proxies of various types. Caching and CDN products. More niche stuff like bot blocking, and this attempt to bundle control and statistics.
It would be nice if some sort of standard pattern emerged, where something was the main orchestrator. At the moment, you can end up with suboptimal stuff. Like a CDN that routes to a cloud API gateway that then routes to a (not geographically close) load balancer, that then hits the actual service.
I'm surprised that Cloudflare, Akamai, and the like haven't offered all of these things at the edge. Some things are service to service, but a fair amount is client to service...putting this stuff closer would help.